That ain't too much carb for it. I'm sure it is significantly less than 600 cfm (measure its' bores). What symptoms are you having? I have an Eddy 1406 600 cfm on a DD 318 & it runs flawless. All OE AVS's are emission carbs and are lean plus the air door adjustment. I'd suggest converting to Eddy performer 2 step rods/primary jets from a strip kit with sizes close to whatever is in the AVS right now maybe going several thou smaller on the "cruise" step for a start. You WILL notice the difference but holler back with what's going on


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